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| Parameter | Specification |
|
| Type of field | 4-field box technique |
| Radiation quality | 6–50 MV (linear accelerators) |
| Dose per fraction | 1.8–2.0 Gy |
| Number of fractions | 23 (median) (range 5–26) |
| Total dose | 46.0 Gy (median) (range 6–50 Gy) |
| Fractionation | Daily fractions, 5 fractions per week |
| Superior field border | L5-S1 disk |
| Inferior field border | Lower margin of the fossa obturatoria |
| Lateral borders | 1 cm lateral of the linea terminals |
|